NSF uses Fastlane or Grants.gov for proposal development and submission. Unless otherwise
required in an NSF solicitation, proposals may still be submitted via Fastlane. Some
solicitations allow submission via either system. However, collaborative proposals
and proposals containing subcontracts must be submitted through NSF Fastlane.

Proposal Development Instructions for PIs -"Things To Do" to Prepare for electronic proposals to NSF via Grants.gov, (Click here) -Instructions for Preparing Components of the NSF Grants.gov Application, (Click here)